diphthong
noun /ˈdɪfθɒŋ/,  /ˈdɪpθɒŋ/
  /ˈdɪfθɔːŋ/,  /ˈdɪpθɔːŋ/
 (phonetics)- a combination of two vowel sounds or vowel letters, for example the sounds /aɪ/ in pipe /paɪp/ or the letters ou in doubt compare monophthong, triphthongWordfinderTopics Languagec1
- cluster
 - consonant
 - diphthong
 - elide
 - intonation
 - phonetics
 - pronunciation
 - stress
 - tone
 - voiced
 
Word Originlate Middle English: from French diphtongue, via late Latin from Greek diphthongos, from di- ‘twice’ + phthongos ‘voice, sound’.